<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    #a {
        width: 720px;
        height: 90px;
        margin: auto;
        list-style: none;
        padding-left: 0px;
    }

    .b {
        float: left;
        width: 120px;
        text-align: center;
        font-size: 40px;
        color: rgb(102, 102, 102);
    }
</style>

<body>
        <ul id="a">
            <li class="b">首页</li>
            <li class="b">新闻</li>
            <li class="b">博问</li>
            <li class="b">会员</li>
            <li class="b">闪存</li>
            <li class="b">班级</li>
        </ul>
    </div>
</body>

</html>